320545745 has 8 divisors (see below), whose sum is σ = 414243816. Its totient is φ = 236710656.

The previous prime is 320545721. The next prime is 320545769. The reversal of 320545745 is 547545023.

It is an interprime number because it is at equal distance from previous prime (320545721) and next prime (320545769).

It can be written as a sum of positive squares in 4 ways, for example, as 63552784 + 256992961 = 7972^2 + 16031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320545745 - 2²⁰ = 319497169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2465672 + ... + 2465801.

It is an arithmetic number, because the mean of its divisors is an integer number (51780477).

Almost surely, 2^320545745 is an apocalyptic number.

It is an amenable number.

320545745 is a deficient number, since it is larger than the sum of its proper divisors (93698071).

320545745 is a wasteful number, since it uses less digits than its factorization.

320545745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4931491.

The product of its (nonzero) digits is 84000, while the sum is 35.

The square root of 320545745 is about 17903.7913582571. The cubic root of 320545745 is about 684.3789956746.

The spelling of 320545745 in words is "three hundred twenty million, five hundred forty-five thousand, seven hundred forty-five".